Ok, for the first time in my life I am about to make the livestock plunge. We are starting off with two in-bred sheep that we are going to fatten and kill. Next year I might get a calf, maybe a goat, maybe even eventually a hog or two. If I am going to set the fencing up so that I only have one type of animal at a time, what is the best way to do it? COmbo panels?? Will cattle panels work? Will hog panels work for sheep and goats, too??? What do I need to look at here....I am sure I am missing SOMETHING, but if they are all 4' high and 16' long, does the size of the opening really matter??????????